This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A025544 #5 Mar 30 2012 18:56:03 %S A025544 2,3,4,5,6,6,7,7,8,8,8,8,9,9,10,11,12,12,12,13,13,14,14,14,15,15,15, %T A025544 15,15,15,16,16,17,17,17,17,17,17,17,17,18,18,19,19,20,20,20,20,20,20, %U A025544 20,21,21,21,21,21,21,22,23,23,23,24,24,24,24,24,24,24,25,25,25,25,25,25 %N A025544 a(n) = sum of the exponents in the prime factorization of the least common multiple of the first n composite numbers. %F A025544 a(n) = A001222(A025543(n+1)). %K A025544 nonn %O A025544 1,1 %A A025544 _Clark Kimberling_ %E A025544 Extended by _Ray Chandler_, May 01 2007